Benzid, Youcef, Imad Chermat, and Saida Khouatra. “An Empirical Analysis of Cost Efficiency in GCC Banking Sector: A Comparative Study Between Islamic & Conventional Banks”. Copernican Journal of Finance & Accounting 15, no. 2 (June 14, 2026). Accessed June 15, 2026. https://apcz.umk.pl/CJFA/article/view/73330.